What is reality?

If we go inside the atom, the very nucleus that this universe is created from, and if we zoom in very, very deep will go inside this other universe that also does not have borders!? So we come to conclusion that reality is only that what is based on perceptions. I don't know what I've just said now but it came to me... :0. This perception of reality that we perceive, is received by the senses. I definitely cannot explain this in plane English, but some people tried to explain, and one of them is Immanual Kant. Kant is German influential philosopher of modern Europe in 18th-century, the classic sequence of the theory of knowledge during the Enlightenment beginning with thinkers John Locke, George Berkeley, and David Hume.

He explained:

All the preparations of reason, therefore, in what may be called pure philosophy, are in reality directed to those three problems only [God, the soul, and freedom]. However, these three elements in themselves still hold independent, proportional, objective weight individually. Moreover, in a collective relational context; namely, to know what ought to be done: if the will is free, if there is a God, and if there is a future world. As this concerns our actions with reference to the highest aims of life, we see that the ultimate intention of nature in her wise provision was really, in the constitution of our reason, directed to moral interests only.

If you understand what he just said up there, please do comment to explain to us...?

And further element to the puzzle is this video documentary about the reality and atom. 'Atom: The Illusion Of Reality' is a BBC Documentary on the nature of reality, the emptiness of an atom and all matter, parallel universes where different versions of us exist and the seemingly emptiness of space which really isn't empty at all.